5300 tape array and device open problems

[David Uraneck]

just installed a "refurbed" 5300 tape array on a rp7400. when we plug in a DLT 8000 from a good working system we get: "on tape open: No such device or address". ioscan -fnC tape sees this device, and device files are there (from insf -e). we can even see a daisy-chained Ultrium 230 (external device) on the same SCSI chain. moved the DLT back to the working 5300 and it works fine again. any suggestions? my guess is a bad 5300

[madoc]

tape array internal cabling can be finnicky.

There is not much that can be done, apart from replacing the backplan under warranty or the entire array. I assume you have tried different slots.

Be aware that there is a fair old run of cabling inside the arrays and you shouldn't daisy chain more than a couple of devices on the same bus within the array